Electrical equipment, in particular switchable or Steuergeraet for motor vehicles

The electrical device disclosed has a flexible circuit board carrying an electronic circuit. This circuit board is fixed at one end (37) to a part (16) of the housing. The circuit board is rolled up in a spiral inside the housing, its edges fitting in spiral grooves (25, 26) in the housing. Power components (40) are located on the zone (37) of the circuit board fixed to the end wall (16) of the housing, the end wall thus acting as a cooling element.